upgrade rocksdb to 0.22.0 #5963

Job	Run time
test (beta)	1m 36s
test (stable)	1m 26s
test (windows)	4m 10s
test (macos)	1m 23s
Check	28s
Check if cbindgen runs cleanly for generating the C headers	8m 39s
coverage	10m 26s
Lints (beta)	37s
Lints (stable)	28s
Publish (on tags, dry-run otherwise)	13m 45s
test_all_features	13m 37s
Run tests under wasm32-wasi	1m 21s
Check if wasm-pack builds a valid package for the sourmash crate	1m 19s
minimum_rust_version	7m 41s
	1h 6m 56s

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